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ladybird/Libraries/LibJS/Token.h

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/*
* Copyright (c) 2020, Stephan Unverwerth <s.unverwerth@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/DeprecatedFlyString.h>
#include <AK/String.h>
#include <AK/StringView.h>
#include <AK/Variant.h>
namespace JS {
// U+2028 LINE SEPARATOR
constexpr char const line_separator_chars[] { (char)0xe2, (char)0x80, (char)0xa8, 0 };
constexpr StringView const LINE_SEPARATOR_STRING { line_separator_chars, sizeof(line_separator_chars) - 1 };
constexpr u32 const LINE_SEPARATOR { 0x2028 };
// U+2029 PARAGRAPH SEPARATOR
constexpr char const paragraph_separator_chars[] { (char)0xe2, (char)0x80, (char)0xa9, 0 };
constexpr StringView const PARAGRAPH_SEPARATOR_STRING { paragraph_separator_chars, sizeof(paragraph_separator_chars) - 1 };
constexpr u32 const PARAGRAPH_SEPARATOR { 0x2029 };
// U+00A0 NO BREAK SPACE
constexpr u32 const NO_BREAK_SPACE { 0x00A0 };
// U+200C ZERO WIDTH NON-JOINER
constexpr u32 const ZERO_WIDTH_NON_JOINER { 0x200C };
// U+FEFF ZERO WIDTH NO-BREAK SPACE
constexpr u32 const ZERO_WIDTH_NO_BREAK_SPACE { 0xFEFF };
// U+200D ZERO WIDTH JOINER
constexpr u32 const ZERO_WIDTH_JOINER { 0x200D };
#define ENUMERATE_JS_TOKENS \
__ENUMERATE_JS_TOKEN(Ampersand, Operator) \
__ENUMERATE_JS_TOKEN(AmpersandEquals, Operator) \
__ENUMERATE_JS_TOKEN(Arrow, Operator) \
__ENUMERATE_JS_TOKEN(Asterisk, Operator) \
__ENUMERATE_JS_TOKEN(AsteriskEquals, Operator) \
__ENUMERATE_JS_TOKEN(Async, Keyword) \
__ENUMERATE_JS_TOKEN(Await, Keyword) \
__ENUMERATE_JS_TOKEN(BigIntLiteral, Number) \
__ENUMERATE_JS_TOKEN(BoolLiteral, Keyword) \
__ENUMERATE_JS_TOKEN(BracketClose, Punctuation) \
__ENUMERATE_JS_TOKEN(BracketOpen, Punctuation) \
__ENUMERATE_JS_TOKEN(Break, Keyword) \
__ENUMERATE_JS_TOKEN(Caret, Operator) \
__ENUMERATE_JS_TOKEN(CaretEquals, Operator) \
__ENUMERATE_JS_TOKEN(Case, ControlKeyword) \
__ENUMERATE_JS_TOKEN(Catch, ControlKeyword) \
__ENUMERATE_JS_TOKEN(Class, Keyword) \
__ENUMERATE_JS_TOKEN(Colon, Punctuation) \
__ENUMERATE_JS_TOKEN(Comma, Punctuation) \
__ENUMERATE_JS_TOKEN(Const, Keyword) \
__ENUMERATE_JS_TOKEN(Continue, ControlKeyword) \
__ENUMERATE_JS_TOKEN(CurlyClose, Punctuation) \
__ENUMERATE_JS_TOKEN(CurlyOpen, Punctuation) \
__ENUMERATE_JS_TOKEN(Debugger, Keyword) \
__ENUMERATE_JS_TOKEN(Default, ControlKeyword) \
__ENUMERATE_JS_TOKEN(Delete, Keyword) \
__ENUMERATE_JS_TOKEN(Do, ControlKeyword) \
__ENUMERATE_JS_TOKEN(DoubleAmpersand, Operator) \
__ENUMERATE_JS_TOKEN(DoubleAmpersandEquals, Operator) \
__ENUMERATE_JS_TOKEN(DoubleAsterisk, Operator) \
__ENUMERATE_JS_TOKEN(DoubleAsteriskEquals, Operator) \
__ENUMERATE_JS_TOKEN(DoublePipe, Operator) \
__ENUMERATE_JS_TOKEN(DoublePipeEquals, Operator) \
__ENUMERATE_JS_TOKEN(DoubleQuestionMark, Operator) \
__ENUMERATE_JS_TOKEN(DoubleQuestionMarkEquals, Operator) \
__ENUMERATE_JS_TOKEN(Else, ControlKeyword) \
__ENUMERATE_JS_TOKEN(Enum, Keyword) \
__ENUMERATE_JS_TOKEN(Eof, Invalid) \
__ENUMERATE_JS_TOKEN(Equals, Operator) \
__ENUMERATE_JS_TOKEN(EqualsEquals, Operator) \
__ENUMERATE_JS_TOKEN(EqualsEqualsEquals, Operator) \
__ENUMERATE_JS_TOKEN(EscapedKeyword, Identifier) \
__ENUMERATE_JS_TOKEN(ExclamationMark, Operator) \
__ENUMERATE_JS_TOKEN(ExclamationMarkEquals, Operator) \
__ENUMERATE_JS_TOKEN(ExclamationMarkEqualsEquals, Operator) \
__ENUMERATE_JS_TOKEN(Export, Keyword) \
__ENUMERATE_JS_TOKEN(Extends, Keyword) \
__ENUMERATE_JS_TOKEN(Finally, ControlKeyword) \
__ENUMERATE_JS_TOKEN(For, ControlKeyword) \
__ENUMERATE_JS_TOKEN(Function, Keyword) \
__ENUMERATE_JS_TOKEN(GreaterThan, Operator) \
__ENUMERATE_JS_TOKEN(GreaterThanEquals, Operator) \
__ENUMERATE_JS_TOKEN(Identifier, Identifier) \
__ENUMERATE_JS_TOKEN(If, ControlKeyword) \
__ENUMERATE_JS_TOKEN(Implements, Keyword) \
__ENUMERATE_JS_TOKEN(Import, Keyword) \
__ENUMERATE_JS_TOKEN(In, Keyword) \
__ENUMERATE_JS_TOKEN(Instanceof, Keyword) \
__ENUMERATE_JS_TOKEN(Interface, Keyword) \
__ENUMERATE_JS_TOKEN(Invalid, Invalid) \
__ENUMERATE_JS_TOKEN(LessThan, Operator) \
__ENUMERATE_JS_TOKEN(LessThanEquals, Operator) \
__ENUMERATE_JS_TOKEN(Let, Keyword) \
__ENUMERATE_JS_TOKEN(Minus, Operator) \
__ENUMERATE_JS_TOKEN(MinusEquals, Operator) \
__ENUMERATE_JS_TOKEN(MinusMinus, Operator) \
__ENUMERATE_JS_TOKEN(New, Keyword) \
__ENUMERATE_JS_TOKEN(NullLiteral, Keyword) \
__ENUMERATE_JS_TOKEN(NumericLiteral, Number) \
__ENUMERATE_JS_TOKEN(Package, Keyword) \
__ENUMERATE_JS_TOKEN(ParenClose, Punctuation) \
__ENUMERATE_JS_TOKEN(ParenOpen, Punctuation) \
__ENUMERATE_JS_TOKEN(Percent, Operator) \
__ENUMERATE_JS_TOKEN(PercentEquals, Operator) \
__ENUMERATE_JS_TOKEN(Period, Operator) \
__ENUMERATE_JS_TOKEN(Pipe, Operator) \
__ENUMERATE_JS_TOKEN(PipeEquals, Operator) \
__ENUMERATE_JS_TOKEN(Plus, Operator) \
__ENUMERATE_JS_TOKEN(PlusEquals, Operator) \
__ENUMERATE_JS_TOKEN(PlusPlus, Operator) \
__ENUMERATE_JS_TOKEN(Private, Keyword) \
__ENUMERATE_JS_TOKEN(PrivateIdentifier, Identifier) \
__ENUMERATE_JS_TOKEN(Protected, Keyword) \
__ENUMERATE_JS_TOKEN(Public, Keyword) \
__ENUMERATE_JS_TOKEN(QuestionMark, Operator) \
__ENUMERATE_JS_TOKEN(QuestionMarkPeriod, Operator) \
__ENUMERATE_JS_TOKEN(RegexFlags, String) \
__ENUMERATE_JS_TOKEN(RegexLiteral, String) \
__ENUMERATE_JS_TOKEN(Return, ControlKeyword) \
__ENUMERATE_JS_TOKEN(Semicolon, Punctuation) \
__ENUMERATE_JS_TOKEN(ShiftLeft, Operator) \
__ENUMERATE_JS_TOKEN(ShiftLeftEquals, Operator) \
__ENUMERATE_JS_TOKEN(ShiftRight, Operator) \
__ENUMERATE_JS_TOKEN(ShiftRightEquals, Operator) \
__ENUMERATE_JS_TOKEN(Slash, Operator) \
__ENUMERATE_JS_TOKEN(SlashEquals, Operator) \
__ENUMERATE_JS_TOKEN(Static, Keyword) \
__ENUMERATE_JS_TOKEN(StringLiteral, String) \
__ENUMERATE_JS_TOKEN(Super, Keyword) \
__ENUMERATE_JS_TOKEN(Switch, ControlKeyword) \
__ENUMERATE_JS_TOKEN(TemplateLiteralEnd, String) \
__ENUMERATE_JS_TOKEN(TemplateLiteralExprEnd, Punctuation) \
__ENUMERATE_JS_TOKEN(TemplateLiteralExprStart, Punctuation) \
__ENUMERATE_JS_TOKEN(TemplateLiteralStart, String) \
__ENUMERATE_JS_TOKEN(TemplateLiteralString, String) \
__ENUMERATE_JS_TOKEN(This, Keyword) \
__ENUMERATE_JS_TOKEN(Throw, ControlKeyword) \
__ENUMERATE_JS_TOKEN(Tilde, Operator) \
__ENUMERATE_JS_TOKEN(TripleDot, Operator) \
__ENUMERATE_JS_TOKEN(Try, ControlKeyword) \
__ENUMERATE_JS_TOKEN(Typeof, Keyword) \
__ENUMERATE_JS_TOKEN(UnsignedShiftRight, Operator) \
__ENUMERATE_JS_TOKEN(UnsignedShiftRightEquals, Operator) \
__ENUMERATE_JS_TOKEN(UnterminatedRegexLiteral, String) \
__ENUMERATE_JS_TOKEN(UnterminatedStringLiteral, String) \
__ENUMERATE_JS_TOKEN(UnterminatedTemplateLiteral, String) \
__ENUMERATE_JS_TOKEN(Var, Keyword) \
__ENUMERATE_JS_TOKEN(Void, Keyword) \
__ENUMERATE_JS_TOKEN(While, ControlKeyword) \
__ENUMERATE_JS_TOKEN(With, ControlKeyword) \
__ENUMERATE_JS_TOKEN(Yield, ControlKeyword)
enum class TokenType {
#define __ENUMERATE_JS_TOKEN(type, category) type,
ENUMERATE_JS_TOKENS
#undef __ENUMERATE_JS_TOKEN
_COUNT_OF_TOKENS
};
constexpr size_t cs_num_of_js_tokens = static_cast<size_t>(TokenType::_COUNT_OF_TOKENS);
enum class TokenCategory {
Invalid,
Number,
String,
Punctuation,
Operator,
Keyword,
ControlKeyword,
Identifier
};
class Token {
public:
Token() = default;
Token(TokenType type, StringView message, StringView trivia, StringView value, size_t line_number, size_t line_column, size_t offset)
: m_type(type)
, m_message(message)
, m_trivia(trivia)
, m_original_value(value)
, m_value(value)
, m_line_number(line_number)
, m_line_column(line_column)
, m_offset(offset)
{
}
TokenType type() const { return m_type; }
TokenCategory category() const;
static TokenCategory category(TokenType);
char const* name() const;
static char const* name(TokenType);
StringView message() const { return m_message; }
StringView trivia() const { return m_trivia; }
StringView original_value() const { return m_original_value; }
StringView value() const
{
return m_value.visit(
[](StringView view) { return view; },
[](DeprecatedFlyString const& identifier) { return identifier.view(); },
[](Empty) -> StringView { VERIFY_NOT_REACHED(); });
}
DeprecatedFlyString DeprecatedFlyString_value() const
{
return m_value.visit(
[](StringView view) -> DeprecatedFlyString { return view; },
[](DeprecatedFlyString const& identifier) -> DeprecatedFlyString { return identifier; },
[](Empty) -> DeprecatedFlyString { VERIFY_NOT_REACHED(); });
}
size_t line_number() const { return m_line_number; }
size_t line_column() const { return m_line_column; }
size_t offset() const { return m_offset; }
double double_value() const;
bool bool_value() const;
enum class StringValueStatus {
Ok,
MalformedHexEscape,
MalformedUnicodeEscape,
UnicodeEscapeOverflow,
LegacyOctalEscapeSequence,
};
ByteString string_value(StringValueStatus& status) const;
ByteString raw_template_value() const;
void set_identifier_value(DeprecatedFlyString value)
{
m_value = move(value);
}
bool is_identifier_name() const;
bool trivia_contains_line_terminator() const;
private:
TokenType m_type { TokenType::Invalid };
StringView m_message;
StringView m_trivia;
StringView m_original_value;
Variant<Empty, StringView, DeprecatedFlyString> m_value {};
size_t m_line_number { 0 };
size_t m_line_column { 0 };
size_t m_offset { 0 };
};
}
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